At least 17 people were killed in a suspected suicide bombing outside a police station in northwestern Pakistan on Sunday, a rescue group and a regional police official said, as the country battles widening insurgencies.The explosion took place in the Kabal area of Swat, a district in Pakistan's Khyber Pakhtunkhwa province.A pro-police rally of local residents was taking place in the same area on Sunday, but it was not immediately clear whether the rally was the intended target.The Tehreek...